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[X86][SSE] Pulled common variables to top of matchUnaryPermuteVectorShuffle. NFCI. 

llvm-svn: 306847
This commit is contained in:
Simon Pilgrim 2017-06-30 18:00:14 +00:00
parent e5e5e59d8b
commit 724990ab64
1 changed files with 4 additions and 5 deletions
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9
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -27107,6 +27107,9 @@ static bool matchUnaryPermuteVectorShuffle(MVT MaskVT, ArrayRef<int> Mask,
unsigned &Shuffle, MVT &ShuffleVT,
unsigned &PermuteImm) {
unsigned NumMaskElts = Mask.size();
unsigned InputSizeInBits = MaskVT.getSizeInBits();
unsigned MaskScalarSizeInBits = InputSizeInBits / NumMaskElts;
MVT MaskEltVT = MVT::getIntegerVT(MaskScalarSizeInBits);
bool ContainsZeros = false;
APInt Zeroable(NumMaskElts, false);
@ -27122,7 +27125,7 @@ static bool matchUnaryPermuteVectorShuffle(MVT MaskVT, ArrayRef<int> Mask,
if (AllowIntDomain && ((MaskVT.is128BitVector() && Subtarget.hasSSE2()) ||
(MaskVT.is256BitVector() && Subtarget.hasAVX2()))) {
int ShiftAmt = matchVectorShuffleAsShift(ShuffleVT, Shuffle,
MaskVT.getScalarSizeInBits(), Mask,
MaskScalarSizeInBits, Mask,
0, Zeroable, Subtarget);
if (0 < ShiftAmt) {
PermuteImm = (unsigned)ShiftAmt;
@ -27138,10 +27141,6 @@ static bool matchUnaryPermuteVectorShuffle(MVT MaskVT, ArrayRef<int> Mask,
return SM_SentinelUndef <= M && M < (int)NumMaskElts;
}) && "Expected unary shuffle");
unsigned InputSizeInBits = MaskVT.getSizeInBits();
unsigned MaskScalarSizeInBits = InputSizeInBits / Mask.size();
MVT MaskEltVT = MVT::getIntegerVT(MaskScalarSizeInBits);
// Handle PSHUFLW/PSHUFHW repeated patterns.
if (MaskScalarSizeInBits == 16) {
SmallVector<int, 4> RepeatedMask;